Accessory for shotguns



` De@ 21 1943- I D. BARBIERI v 2,337,021

ACCESSORY FOR SHT GUNS .Filed April l, 1941 INVNTOR. UA V/D Bmw/'ERI' Patented Dec. 2l, 1Q43 2 Claims.

This invention relates to accessories for shot guns and refers more particularly to a member designated to be positioned within the rear portion of the gun barrel and so constructed and arranged as to adapt the gun for use in the ring therefrom of rim nre shot gun shells of smaller caliber than the barrel gauge.

The ammunition used in shot guns is of the center lire type and the ring pin is disposed centrally of the bore so as to strike the center of the shell. rlhe present invention comprehends an accessory in the nature of a supplemental barrel having an eccentrically arranged shell chamber adapted to receive rim nre shot gun shells lof smaller caliber than the gun barrel gauge and functioning to dispose a portion of the rim in a position to be struck by the centered firing pin of the gun.

The invention further resides in the provision of an 'accessory of the character set forth which l is positioned in the shell chamber and extends forwardly therefrom into the adjacent rear portion of the bore of the gun barrel to adapt the same for use in iiringrim fire shot gun shells of smaller caliber than the barrel gauge; by Virtue of which the benefit of the gun barrel choke is obtained resulting in a more uniform spread and better shot pattern while the bore of the accessory is of such a length as to provide a sustained compression making for effective penetration of the shot in the target.

As a further feature, the invention comprehends a shot gun accessory of the indicated character including a shell ejector which is so constructed and arranged as to be actuated by and with the ejector mechanism of the shot gun Yfor ejecting the shells from the accesso-ry without displacing the latter from the gun.

The invention further embodies means for detachably securing the accessory within the shot gun barrel against accidental or unintentional displacement while permitting of intentional removal thereof when desired.

With the above recited and other objects in view, the invention is set forth in greater detail in the following specification and illustrated in the accompanying drawing in which:

Fig. l is a fragmentary perspective View of a shot gun in opened position illustrating the accessory in applied relation to the barrel.

Fig. 2 is an enlarged fragmentary longitudinal vertical sectional view through the shot gun barrel with the accessory arranged therein.

Fig. 3 is a horizontal longitudinal sectional view taken approximately on the line 3 3 of Fig. 2.

Fig. 4 is a fragmentary transverse sectional View taken approximately on the line :il-4 of Fig. 2.

Fig. 5 is an enlarged fragmentary perspective view of the accessory removed from the shot gun barrel.

Referring to the drawing by characters of reference, A designates a shot gun, B the barrel thereof, C the usual shell chamber and D the bore leading from the shell chamber to theouter end or muzzle which is usually constritedto provide a choke not shown. The gun'is provided with the usual firing pin E which isarranged to strike the center of a shell arranged in the shell chamber C as the ammunitionusedin shot guns is of the center lire type.

The accessory constituting the present invention and which is in the nature of a supplemental barrel is designated generally by the reference character F and consists of an elongated tubular member, the rear portion itl of whichis of a cross sectional size to snugly it within the shell chamber C of the gun barrel B and is provided at its rear edge with a substantially semi-circular bead Il for engagement with the annular rabbet or chamfer G at the rear end of the shell chamber. The accessory F is provided with a forwardly projecting portion l2 extending into the rear portion of the bore Dadjac'ent'the shell chamber C. The forwardly projecting portion l2 at its forward end i3 is of an external diameter corresponding approximately to the diameter of the bore D of the gunbarrel and intermediate the rear portion lil and forward end i3 the projecting portion I2 fis preferably 'cut away exteriorly for the purpose of reducing the weight of the accessory.

The rear portion Il] of the vaccessory is provided with an axially extending eccentrically 1arranged shell chamber I to receive a shot gun shell H of the rim lire type with the rim I tting within the charnfer l5 at the rear of the shell chamber lll. The eccentric arrangement of the shell chamber I4 and chamfer l5 disposes a porn tion of the shell rim I in a position to be struck by the firing pin E of the shot gun, thus converting the gun from a center re type to a rim fire type when the accessory is associated therewith.

The accessory F is provided with a longitudinally extending bore i6 which extends from the shell chamber Il through the forward end there. of and preferably the bore I6 extends slightly at an angle to the axis of the gun barrel so that the forward end of the bore is substantially concentric to the bore of the gun barrel.

The accessory F is provided with an ejector II which normally nts within a recess I8 extending radially from the rear end of the shell chamber I4 and opening through the periphery of the accessory which is not provided with the bead II and the accessory ejector is formed with an outwardly directed rib I9 which is engaged by the gun ejector J so that the accessory ejector is actuated by and with the gun ejector t displace the shot gun shell H from the shell chamber I4 of the accessory coincident with the actuation of the gun ejector.

The accessory ejector is formed ,with a shank 2t having undercut or beveled opposite edges 2i slidably associated in a dovetail groove 22 in the outer periphery of the accessory. A retaining screw 23 extends through the shank 2i! and its inwardly projecting terminal engages in a recess 24 extending longitudinally of and communicating With the dovetail groove 22.

The accessory F is secured within the shell chamber against accidental or unintentional displacement by means of a jamb block 25 which is slidably fitted in a groove 26 in the periphery of the accessory, the inner Wall 2'! of the groove and the inner face 28 of the jamb block being longitudinally inclined to effect the radial contraction and expansion of the jamb block upon relative longitudinal movement thereof. The longitudinal movement of the jamb block is effected by means of a screw 29 which is rotatably journaled in the rear portion I0 of the accessory with its threaded terminal 3G engaging a threaded bore 3| in the jamb block and with its kerfed head 32 arranged flush with and exposed through a recessed opening 33 in the rear face of the accessory.

In use the accessories may be made in various sizes to fit a ten, twelve, sixteen, twenty, twentyeight or four hundred and ten gauge shot gun and the shell chamber I4 is made to accommodate twenty-two caliber scatter load or shot gun shells of the rim re type. The accessory is inserted in the rear end of the shot gun barrel B with the rear portion I0 thereof snugly fitted in the shot gun shell chamber C, the ejector I'I of the accessory being disposed so that its outwardly directed rib I3 engages the ejector element J of the gun and with the semicircular bead II arranged so as to be disposed out of engagement with the gun ejector J. The screw 29 is then turned to effect longitudinal movement of the jamb block 25 to expand the same and hind against the shell chamber C of the gun.

The bore I6 of the accessory leading from the shell chamber Il! thereof extends forwardly at an angle to the axis of the gun barrel so that when the shell H is fired, the load or shot is guided and discharged substantially at the center of the bore of the shot gun barrel from whence it is guided therethrough to the muzzle and caused by the choke to be uniformly spread for obtaining a desirable shot pattern. The eccentric position of the shell chamber I4 of the accessory disposes a portion of the rim I of the shell in alignment with the firing pin E of the gun and in effect converts the gun from the center re type to the rim fire type. Where the shot gun is of the double barrel type, each barrel may be provided as shown in Fig. 4 with an accessory and the ejector J of the gun will be em.-

ployed to actuate the ejectors of both of the acy cessories.

What is claimed is:

1. In an accessory for shot guns, a supplemental barrel adapted to be positioned within the rear end of the gun barrel and consisting of an elongated tubular member having a rear portion of a cross sectional size to snugly t within the shell chamber of the gun barrel, and a forward portion of a cross sectional size to snugly fit the bore of the gun barrel intermediate the ends thereof, said rear portion having an eccentrically arranged shell chamber with its axis disposed parallel to the axis of the gun barrel and adapted to receive a rim fire shell for disposing a portion of the shell rim in alignment with the ring pin of the gun for engagement thereby, said forward portion having a longitudinally extending bore extending therethrough from the shell chamber at an angle to the axis of the gun barrel With the forward end of said bore arranged concentric to the gun barrel to discharge the shell load into the barrel centrally thereof.

2. An accessory for shot guns including a cylindrical member adapted to snugly t within the shell chamber of a shot gun barrel and having an eccentrically arranged bore dening a shell chamber of a reduced size with reference to that of the gun with its axis disposed parallel to the axis of the gun barrel and adapted to receive a rim fire scatter load shell for disposing a portion of the shell rim in alignment with the firing pin of the gun for engagement thereby, a tubular barrel integral with the cylindrical member, of a reduced cross sectional size with reference thereto, extending forwardly therefrom at an angle thereto and having a bore communieating with the shell chamber thereof with its axis at an angle to that of the shell chamber of the accessory, an enlarged terminal integral with and formed at the forward end of said tubular barrel, said terminal being of a cross sectional size to t the bore of the gun barrel and disposing the forward end of the bore of the tubular barrel concentric with the bore of the gun barrel.

DAVID BARBIERI. 

